CVE-2026-4176

9.8 CRITICAL

Published: March 29, 2026 Modified: March 30, 2026

Description

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://lists.security.metacpan.org/cve-announce/msg/37638919/

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/PMQS/Compress-Raw-Zlib-2.221/source/Changes

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/SHAY/perl-5.40.4/changes

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/SHAY/perl-5.42.2/changes

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://www.cve.org/CVERecord?id=CVE-2026-3381

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

http://www.openwall.com/lists/oss-security/2026/03/30/2

Source: af854a3a-2127-422b-91ae-364da2661108

7 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.8 / 10.0

EPSS (Exploit Probability)

0.0%

7th percentile

Exploitation Status

Not in CISA KEV